The sound can actually be made "much" better by downloading timidity++ from a Japanese site and also download a free soundfont to use with it. It's a simple process but you will need a small tool for Vista to direct midi sound to Timidity instead of Windows Midi.
Here is how to do it:
http://forums.scummvm.org/viewtopic....light=timidity
You will also need to edit dosbox.cfg to direct sound to timidity.